<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script src="https://unpkg.com/vue@next"></script>
<div id="app">
    <!-- 选中时，将selected设置为:value的值   -->
    <select v-model="selected">
        <option :value="{number: 123}">123</option>
    </select>
    <span>selected:{{selected}}</span>
</div>
<script>
    const vueOpt = {
        data() {
            return {
                selected: ''
            }
        }
    }
    Vue.createApp(vueOpt).mount('#app')
</script>
</body>
</html>
